ArrayBuffer Lazy-assignment for GPU Context#5076

Draft

SamSJackson wants to merge 24 commits intoconnorjward/pyop3from

SamSJackson/pyop3-outer

Commits on Apr 27, 2026

introduce device.py and set up branch
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Commits on Apr 28, 2026

const parameter for host device
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include gpu demo and update petsc version as 3.24.5 misaligned for PCPatch*ExteriorFacets
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noting areas for change
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introducing context variable and lazy cupy
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Commits on Apr 29, 2026

lazy evaluation of arrays
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passes basic script functionality
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tofix: revised approach ensuring explicit choice of GPU device
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Commits on Apr 30, 2026

implicit transfer and defaultdict implementation (pub/sub eager copy model)
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explicit check if GPU available on init
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cudagpu and fix incoming re: remove eager copying/register & dev syncing
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Commits on May 1, 2026

move conversion logic to device.py
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managing buffer duplicate
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cleanup unnecessary todos/notes
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Commits on May 4, 2026

removing notes and cleaning
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fix: added copy to avoid weak reference
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test: data_wo access works in context
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add flatten from prev logic
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context function as global function and def state
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fix: maintaining constant array property
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pr review: removing unused variables
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remove dispatch to allow no-import cupy
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pr: fix property, duplicate, init
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fix: change petsc config version to v3.25.0
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